Method and apparatus to make a discharge vessel for a sodium hig

Details Method and apparatus to make a discharge vessel for a sodium hig Method and apparatus to make a discharge vessel for a sodium hig

1991-11-01

1993-03-09

Seidel, Richard K.

Electric lamp or space discharge component or device manufacturi

Process

Generating gas or vapor within an envelope, or coating by...

445 26, 445 40, H01J 9395

Patent

active

051922398

ABSTRACT:
The method is suitable to make sodium high-pressure discharge lamps operag operating under saturated condition. After placing and melt-sealing a first electrode system into the discharge vessel, sodium is introduced in the form of NaN.sub.3 through the second end of the vessel. Upon heating of the second end, and due to heat conduction, the NaN.sub.3, collected at the first end, dissociates, resulting in a sudden pressure rise due to liberation of nitrogen within a vacuum. As soon as the nitrogen has dissipated, noble gas to cool the first end is introduced, and the second melt seal is then made. The noble gas may, at the same time, form an ignition gas, or a gas mixture for the discharge lamp. One or more half-finished lamps are preferably held in a holder structure which has vertical bores leaving a gap of between 0.2 to 3 mm between the wall surface of the bore and the vessel and, as such, are introduced into a vacuum furnace, where the pressure can be monitored.

REFERENCES:
patent: 2660004 (1953-11-01), Daley
patent: 3973816 (1976-08-01), Van Bakel et al.
patent: 4156550 (1979-05-01), Furukubo et al.
patent: 4866341 (1989-09-01), Ichiga et al.
patent: 5022882 (1991-06-01), White et al.

Affiliated with

Also associated with

Rating

Method and apparatus to make a discharge vessel for a sodium hig does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus to make a discharge vessel for a sodium hig, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to make a discharge vessel for a sodium hig will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-207366